package demo4.mapper;

import demo4.pojo.User;
import demo4.util.IDBUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

@Component
public class UserMapper implements IUserMapper{
    @Autowired
    private IDBUtil dbUtil;


    @Override
    public int insert(User user) {
        try (Connection connection = dbUtil.getConnection()){
            String sql = "insert into user(username,password,nickname,age)"+
                         " values(?,?,?,?)";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,user.getUsername());
            ps.setString(2,user.getPassword());
            ps.setString(3,user.getNickname());
            ps.setInt(4,user.getAge());

            return ps.executeUpdate();

        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }

    @Override
    public User selectByUsername(String username) {
        try (Connection connection = dbUtil.getConnection()){
            String sql = "select id,username,password,nickname,age "+
                         "from user "+
                         "where username=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs = ps.executeQuery();
            if (rs.next()){
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setNickname(rs.getString("nickname"));
                user.setAge(rs.getInt("age"));
                return user;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }


    @Override
    public List<User> selectAll() {
        List<User> userList = new ArrayList();
        try (Connection connection = dbUtil.getConnection()){
            String sql = "select id,username,password,nickname,age "+
                         "from user";
            Statement statement = connection.createStatement();
            ResultSet rs = statement.executeQuery(sql);
            while (rs.next()){
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setNickname(rs.getString("nickname"));
                user.setAge(rs.getInt("age"));
                userList.add(user);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return userList;
    }

    public int update(User user) {
        try (Connection connection = dbUtil.getConnection()){
            String sql = "update user set password=?,nickname=?,age=? "+
                         "where username=?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,user.getPassword());
            ps.setString(2,user.getNickname());
            ps.setInt(3,user.getAge());
            ps.setString(4,user.getUsername());
            return ps.executeUpdate();
        }catch (SQLException e){
            e.printStackTrace();
        }
        return 0;
    }
}
